temperature-humidity index

American  

[tem-per-uh-cher-hyoo-mid-i-tee in-deks, -yoo-, -pruh-, -per-cher-, -choor] / ˈtɛm pər ə tʃər hyuˈmɪd ɪ ti ˈɪn dɛks, -yu-, -prə-, -pər tʃər-, -ˌtʃʊər /

noun

Meteorology.

1. a number representing an estimate of the potentially debilitating effect of temperature and relative humidity on humans and animals, especially livestock: computed essentially as a combination of dry-bulb temperature and wet-bulb temperature but formulaically specific to a given species, as heat-stress tolerances vary significantly from one species to another. THI, T.H.I.

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temperature-humidity index British  

noun

1. an index of the effect on human comfort of temperature and humidity levels, 65 being the highest comfortable level

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Etymology

Origin of temperature-humidity index

First recorded in 1955–60